Tibby likes to chew on plastic, but as far as I know she doesn't ingest it. If there is a plastic bag on the floor she will chew on it for a little while, but she won't eat it. Corkscrew LOVES chewing up my sandals. Good thing flip flops are cheap, you'd think I have a dog in the house the way he chews my sandals. Every pair of flip flops I own have bite marks all over them.